1. Pulmonary MedicineIntermountain Healthcare Salt Lake City Utah USA
2. Department of Medicine, Division of Hematology and OncologyUniversity of Vermont Medical Center and Larner College of Medicine Burlington Vermont USA
3. College of Engineering and Mathematical ScienceUniversity of Vermont Burlington Vermont USA
4. Jeffords Institute for Quality–AnalyticsUniversity of Vermont Medical Center Burlington Vermont USA
5. Department of Critical Care MedicineQueen's UniversityKingston Ontario Canada
6. Department of Medicine, Division of Pulmonary and Critical Care MedicineUniversity of Vermont Medical Center and Larner College of Medicine Burlington Vermont USA